Bump image texture doesn't work anymore
Using a normal map only gives the illusion that the surface is altered by changing the surface reflections at a given point. In the viewport you are viewing the shield at an acute angle so you see the true geometry of the mesh. Your second example is using an emit shader to view the bump map, by emitting light it will not show any of the reflections that give the illusion of an altered surface.

To get real surface changes you may want to try a displacement modifier. Note that this modifier will only move existing geometry, it will not add new geometry to get the final surface you want, so you may want to use a subdivision modifier before it.

A still experimental feature in cycles is textured surface displacement. While similar to the displacement modifier the displacement is performed within cycles using the material displacement. Cycles can also be set to perform some subdivision to get more detail.